Commit 0f6372e5 authored by Sami Tolvanen's avatar Sami Tolvanen Committed by Masahiro Yamada
Browse files

treewide: remove DISABLE_LTO 

This change removes all instances of DISABLE_LTO from
Makefiles, as they are currently unused, and the preferred
method of disabling LTO is to filter out the flags instead.

Note added by Masahiro Yamada:
DISABLE_LTO was added as preparation for GCC LTO, but GCC LTO was
not pulled into the mainline. (https://lkml.org/lkml/2014/4/8/272

)

Suggested-by: default avatarKees Cook <keescook@chromium.org>
Signed-off-by: default avatarSami Tolvanen <samitolvanen@google.com>
Reviewed-by: default avatarKees Cook <keescook@chromium.org>
Signed-off-by: default avatarMasahiro Yamada <masahiroy@kernel.org>
parent 0fa21cf4

arch/arm64/kernel/vdso/Makefile

+0 −1
Original line number Diff line number Diff line
@@ -31,7 +31,6 @@ ccflags-y := -fno-common -fno-builtin -fno-stack-protector -ffixed-x18 
ccflags-y += -DDISABLE_BRANCH_PROFILING



CFLAGS_REMOVE_vgettimeofday.o = $(CC_FLAGS_FTRACE) -Os $(CC_FLAGS_SCS) $(GCC_PLUGINS_CFLAGS)

KBUILD_CFLAGS			+= $(DISABLE_LTO)

KASAN_SANITIZE			:= n

UBSAN_SANITIZE			:= n

OBJECT_FILES_NON_STANDARD	:= y

arch/sparc/vdso/Makefile

+0 −2
Original line number Diff line number Diff line
@@ -3,8 +3,6 @@ 
# Building vDSO images for sparc.

#



KBUILD_CFLAGS += $(DISABLE_LTO)



VDSO64-$(CONFIG_SPARC64)	:= y

VDSOCOMPAT-$(CONFIG_COMPAT)	:= y

arch/x86/entry/vdso/Makefile

+0 −2
Original line number Diff line number Diff line
@@ -9,8 +9,6 @@ ARCH_REL_TYPE_ABS := R_X86_64_JUMP_SLOT|R_X86_64_GLOB_DAT|R_X86_64_RELATIVE| 
ARCH_REL_TYPE_ABS += R_386_GLOB_DAT|R_386_JMP_SLOT|R_386_RELATIVE

include $(srctree)/lib/vdso/Makefile



KBUILD_CFLAGS += $(DISABLE_LTO)



# Sanitizer runtimes are unavailable and cannot be linked here.

KASAN_SANITIZE			:= n

UBSAN_SANITIZE			:= n

kernel/Makefile

+0 −3
Original line number Diff line number Diff line
@@ -38,9 +38,6 @@ KASAN_SANITIZE_kcov.o := n 
KCSAN_SANITIZE_kcov.o := n

CFLAGS_kcov.o := $(call cc-option, -fno-conserve-stack) -fno-stack-protector



# cond_syscall is currently not LTO compatible

CFLAGS_sys_ni.o = $(DISABLE_LTO)



obj-y += sched/

obj-y += locking/

obj-y += power/

scripts/Makefile.build

+1 −1
Original line number Diff line number Diff line
@@ -111,7 +111,7 @@ endif 
# ---------------------------------------------------------------------------



quiet_cmd_cc_s_c = CC $(quiet_modtag)  $@

      cmd_cc_s_c = $(CC) $(filter-out $(DEBUG_CFLAGS), $(c_flags)) $(DISABLE_LTO) -fverbose-asm -S -o $@ $<

      cmd_cc_s_c = $(CC) $(filter-out $(DEBUG_CFLAGS), $(c_flags)) -fverbose-asm -S -o $@ $<



$(obj)/%.s: $(src)/%.c FORCE

	$(call if_changed_dep,cc_s_c)

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